Inspiron 560 components on a new motherboard?

Since my Inspiron 560 is overheating when I run more than 2 programs at once and since I have a gaming case which I planned to use once I got all my new equiptment but this problem of overheating came along so I thought of using it with the components from my Inspiron 560. I was wondering, can the components be used on a new motherboard? Before I tried moving the motherboard and all to the new case but that didn't work because the motherboard didn't have the right connectors, I asked around and people said the motherboard was made for the case, this made me think, are the other components made for the case as well?

Im planning on getting a Gigabyte GA-870A-USB3 AMD 870 motherboard which fits the job. I think I will have to get a new power supply since it's only 300watts. Also some more RAM since its 533MHz which is sorta awkward

I think most the components will fit (cpu, gpu, hdd drive and card reader) but with people saying the motherboard was made for the case that confused me.

well if your technical enough what you could do if the cpu is overheating is remove the cpu and clean the old thermal paste and and re-apply a new thermal paste and see if that fixes your overheating...it will only cost you no more than $20 to ssee if that helps...which in past overheating problems applying new thermal paste fixed the problem for me! its very simple procedure to do

I will give it a try when I get some more thermal paste! Since dell had to replace the motherboard and graphics card around 6 months ago the paste should be fairly freshish but i'll give it a try.